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The Influence of Classic on TSWV of Peanuts

E. P. Prostko
R. C. Kemerait
W. C. Johnson, III
B. J. Brecke
S. N. Brown

University of Georgia
Tifton, GA

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TABLE OF CONTENTS

The Influence of Classic on TSWV of Peanuts Annual Losses To TSWV in Geogia Peanuts Tomato Spotted Wilt Risk Index Classic Issues in Peanut Objective Materials and Methods Materials and Methods: Planting Dates Results: TSWV TSWV As Influenced By Classic Applications - 2000 TSWV As Influenced By Classic Applications - 2001 TSWV As Influenced By Classic Applications - 2001 TSWV As Influenced By Classic Applications - 2001 TSWV as Influenced by Classic Applications (2000-2001) Results: Peanut Yield Peanut Yield As Influenced By Classic Applications - 2000 Peanut Yield As Influenced By Classic Applications - 2001 Peanut Yield As Influenced By Classic Applications - 2001 Peanut Yield As Influenced By Classic Timing - 2001 Peanut Yield as Influenced by Classic Applications (2000-2001) What about other herbicides? TSWV As Influenced By PRE Herbicides - 2000 TSWV in Response to Valor Timings TSWV As Influenced By Other Herbicide Applications - 2001 TSWV As Influenced By Ultra Blazer Applications - 2001 Summary Acknowledgment University of Georgia Extension Weed Science

SLIDE CONTENTS

The Influence of Classic on TSWV of Peanuts E. P. Prostko, R. C. Kemerait, W. C. Johnson, III, B. J. Brecke, and S. N. Brown University of Georgia Tifton The University of GeorgiaTomato Spotted Wilt Risk Index variety planting date plant population insecticide row pattern tillage others yet to be discovered Classic Issues in Peanut 20-25% of GA acreage late-season beggarweed tolerance of new varieties influence on TSWV Objective evaluate the influence of Classic applications on TSWV and yield of peanut. Materials and Methods small plot techniques 5 locations (4-GA, 1-FL) GA Green, C-99R Classic applied 21 to 90 DAE TSWV ratings yield Materials and MethodsPlanting Dates ResultsTSWV TSWV As Influenced By Classic Applications - 2000 Averaged over 2 varieties (GA Green, C-99R) * LSD (0.05) = 7 +LSD (0.10) = 6 *+ *+ *+ Tifton, GA TSWV As Influenced By Classic Applications - 2001 Averaged over 2 varieties (GA Green, C-99R) * LSD (0.05) = 9 +LSD (0.10) = 7 Tifton, GA *+ *+ TSWV As Influenced By Classic Applications - 2001 C-99R *LSD (0.05) = NS +LSD (0.10) = 11 Attapulgus, GA + + TSWV As Influenced By Classic Applications - 2001 GA Green * LSD (0.05) = 11 +LSD (0.10) = 9 Colquitt County, GA *+ + TSWV as Influenced by Classic Applications (2000-2001) 4 trials conducted in GA Averaged over 2 varieties (GA Green and C-99R) ResultsPeanut Yield Peanut Yield As Influenced By Classic Applications - 2000 Averaged over 2 varieties (GA Green, C-99R) *LSD (0.05) = 561 +LSD (0.10) = 467 *+ *+ *+ Tifton, GA Peanut Yield As Influenced By Classic Applications - 2001 Averaged over 2 varieties (GA Green, C-99R) *LSD (0.05) = 354 +LSD (0.10) = 296 Tifton, GA * + + + Peanut Yield As Influenced By Classic Applications - 2001 C-99R *LSD (0.05) = 491 +LSD (0.10) = 411 Attapulgus, GA Peanut Yield as Influenced by Classic Timing - 2001 Jay, FL Averaged over 2 varieties (GA Green, C-99R) *LSD 0.05 = 554 +LSD 0.10 = 463 * + + Peanut Yield as Influenced by Classic Applications (2000-2001) 3 trials conducted in GA/1 trial conducted in FL weed-free conditions What about other herbicides? TSWV As Influenced By PRE Herbicides - 2000 Averaged over 2 varieties (GA Green, C-99R) * LSD (0.05) = 7 +LSD (0.10) = 6 Tifton, GA TSWV in Response to Valor Timings Tifton, GA September 13, 2001 GA Green Planted: May 8 bc bc c b b a a TSWV As Influenced By Other Herbicide Applications - 2001 (LSD 0.05 - NS) (LSD 0.10 = 11) (LSD 0.05 = 9) (LSD 0.10 = 7) (LSD 0.05 = 11) (LSD 0.10 = 9) TSWV As Influenced By Ultra Blazer Applications - 2001 Averaged over 2 varieties (GA Green, C99R) * LSD (0.05) = 12 +LSD (0.10) = 10 Tifton, GA *+ Summary Classic can increase TSWV but not always. Classic/TSWV interaction can reduce yields but not always. Earlier applications of Classic?? Other herbicides have not influenced TSWV. ACKNOWLEDGMENT This research was partially supported through a grant provided by the Georgia Agricultural Commodity Commission for Peanuts. University of Georgia Extension Weed Science (gaweed.com)